package com.mrc.ak.showMan.utils;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.imageio.ImageIO;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * <p>
 * Description: 
 * </p>
 *
 * @author Mrc
 * @version 4.1

 * <p>
 * History: 
 *
 * Date                     Author         Version     Description
 * ---------------------------------------------------------------------------------
 * 2017-1-10 下午3:51:55          Mrc        4.1         To create
 * </p>
 *
 * @since 
 * @see     
 */
public class Base64AndImg {

    public static boolean GenerateImage(String imgStr, String imgFilePath) {// 对字节数组字符串进行Base64解码并生成图片
        if (imgStr == null) // 图像数据为空
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            // Base64解码
            byte[] bytes = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < bytes.length; ++i) {
                if (bytes[i] < 0) {// 调整异常数据
                    bytes[i] += 256;
                }
            }
            // 生成jpeg图片
            OutputStream out = new FileOutputStream(imgFilePath);
            out.write(bytes);
            out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            return false;
        }
    }

    //    public static String GetImageStr(String imgFilePath) {
    //        InputStream in = null;
    //        try {
    //            in = new FileInputStream(imgFilePath);
    //        } catch (FileNotFoundException e) {
    //            e.printStackTrace();
    //        }
    //        return GetImageStr(in);
    //    }

    /**
     * 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
     * @param in
     * @return
     */
    public static String GetImageStr(BufferedImage image) {
        try {
            //BufferedImage转BufferedImage
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            ImageIO.write(image, "png", os);
            InputStream in = new ByteArrayInputStream(os.toByteArray());

            byte[] data = null;
            // 读取图片字节数组
            data = new byte[in.available()];
            in.read(data);
            in.close();
            // 对字节数组Base64编码
            BASE64Encoder encoder = new BASE64Encoder();
            // 返回Base64编码过的字节数组字符串
            return encoder.encode(data);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;

    }

}
